             ::transformation.engine.s/op]
    :opt-un [::transformation.engine.s/created
             ::transformation.engine.s/namespace]))
-
-
 
 (create-ns  'akvo.lumen.specs.transformation.change-datatype)
 (alias 'transformation.change-datatype 'akvo.lumen.specs.transformation.change-datatype)

   :req-un [::transformation.trim-doublespace/args
            ::transformation.engine.s/onError
            ::transformation.engine.s/op]
   :opt-un [::transformation.engine.s/namespace
            ::transformation.engine.s/namespace]))

(create-ns  'akvo.lumen.specs.dataset-version.transformation)
(alias 'db.dsv.transformation 'akvo.lumen.specs.dataset-version.transformation)

  (s/keys :req-un [::db.dsv.column.s/columnName]))


(defmethod op-spec "core/delete-column"  [_]
  (s/keys
   :req-un [::transformation.delete-column/args
